* {
    margin: 0;
    padding: 0;
}

.top {
    width: 100%;
    height: 10vh;
    display: flex;
    margin-bottom: 1vh;
}

.top > div:first-child {
    width: 10vh;
    height: 10vh;
}

#companylogo {
    width: 100%;
    height: 100%;
}

#company {
    width: 35vh;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgb(36, 157, 80);
}

#ch_name {
    font-size: 24px;
    font-weight: bolder;
    font-family: 微软雅黑;
}

#en_name {
    font-family: "fantasy";
    font-style: italic;
}

.top > div:last-child {
    width: 155vh;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

#navigation > div{
    margin: 0 10px;
}

#home{
    cursor: pointer;
}

#exit:link {
    width: 8vh;
    height: 4vh;
    color: gray;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    cursor: pointer;
}

#exit:visited {
    cursor: pointer;
    color: rebeccapurple;
}

#exit:hover {
    cursor: pointer;
    color: brown;
}

.content {
    width: 100%;
    height: auto;
    display: flex;
}

.content > div {
    margin: 0 1vh;
}

.left {
    width: 20%;
    height: auto;
    overflow: hidden;
    box-shadow: 1px 1px 4px gray;
    border: 1px solid gray;
    border-radius: 5px;
}

.menu {
    overflow: hidden;
    height: 0px;
    transition: all 0.3s ease;
}

.menu_title {
    width: 100%;
    height: 50px;
    line-height: 50px;
    background: #fafafa;
    color: gray;
    font-size: 20px;
    padding-left: 15px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    font-weight: bold;
    overflow: hidden;
}

.menu_title:hover {
    background: #dedede;
    color: black;
}

.indicator {
    width: 50px;
    height: 50px;
    font-weight: bold;
    position: absolute;
    right: 0px;
    top: 0px;
    transition: all 0.3s ease;
    font-weight: bold;
    text-align: center;
}

.item {
    width: 290px;
    height: 40px;
    line-height: 40px;
    background: gray;
    color: white;
    padding-left: 30px;
    transition: all 0.3s ease;
    cursor: pointer;
    overflow: hidden;
}

.item:hover {
    background: #B22222;
}

.item a {
    width: 290px;
    height: 40px;
    display: block;
    text-decoration: none;
    color: white;
    text-decoration: none;
}

.item_divider {
    width: 322px;
    height: 1px;
    background: white;
    display: block;
    opacity: 0.8;
}

.menu_divider {
    width: 100%;
    height: 1px;
    background: gray;
}

.right {
    width: 80%;
}
